harring-



(No Model.)

G.'W. HARRINGTON. SWAGE FOR FORMING BEADS ON THE ENDS 0F LBAD LINED PIPES.

No. 485,692. v- Patented Nov. 8, 1892.

WIW'NEEEE I [bk/ENTDK UNITED STATES PATENT OFFICE.

GEORGE W. HARRINGTON, OF WAKEFIELD, MASSACHUSETTS, ASSIGNOR 0F ONE-HALF TO D. H. DARLING, OF SAME PLACE.

SWAGE FOR FORMING BEADS ON THE ENDS 0F LEAD-LINED PIPES.

SPECIFICATION forming part of Letters Patent No. 485,692, dated November 8, 1892.

Application filed November 20, 1891- Serial No. 412,491. (No model.)

To all whom, it may concern.-

Be it known that I, GEORGE W. HARRING- TON, of Wakefield, in the county of Middlesex and State of Massachusetts, have invented a certain new and usefulImprovementin Swages for Forming Beads on the Ends of Lead-Lined Pipes, of which the following is a specification.

This invention has for its object to provide a simple and effective tool for swaging the projecting end of the lead lining of a wroughtiron pipe and converting said end into an annular bead lying upon the end of the hardmetal pipe.

The invention consists in the improved tool, which I will now proceed to describe, said tool being intended for use principally in adapting ends of lead-lined wrought-iron servicepipes for connection with lead-lined couplings used in connecting said pipes in lengths or sections.

Of the accompanying drawings, forming part of this specification, Figure 1 represents a side elevation of myimproved swage. Fig. 2 represents a section on line2 2, Fig. 1. Fig. 3 represents a section on line 3 3, Fig. 1, looking toward the left. Fig. at represents a section similar to a portion of Fig. 2, showing the swage in the operation of forming a bead.

The same letters of reference indicate the same parts in all the figures.

My improved tool comprises in its construction a plug a, formed to closely fit a lead lining b of a wrought-iron service-pipe c, as shown in Fig. A, and an annular swaging-die a, surrounding the base of said plug and formed to move or press the projecting end of the lead lining into a bead b, lying upon the end of the iron pipe 0. The lead-lined pipe is prepared for the formation of the bead b by causing the end of the lead lining to project a suitable distance outside of the end of the iron pipe, then inserting the plug a in the interior of the lead lining, and then driving the plug into the lining until the die a meets the projecting end of the lining and swages the same into the form shown in Fig. 4. The plug a, closely fitting the interior of the lining, prevents the projecting portion of the lead from being turned inwardly, so thatit is obliged to turn outwardly and is confined within the die by the shape of the latter, the die having a semicircular form in cross-section.

a represents an annular knife or trimmer, which surrounds the die a and is formed to trim off the surplus lead that exudes from the die when thelatter is entirely filled by the lead, said knife coming in contact with the end of the hard-metal pipe,and thus separating the surplus metal froni the bead. The bead is thus given a cleanand Well-defined outer edge.

The annular knife a is formed at the meeting-point of the annular recess, which forms the die a, and the outer beveled portion of the tool-stock, as shown. This beveled portion of the stock is an important feature of my invention, for the reason that if the stock outside of the recess had aface at a right angle to the length of the tool no cutting-edge would be formed, and if such portion of the stock werereduced until. its sides were parallel with the length of the tool the cuttingedge would not have the necessary strength.

The bead formed by the described tool is narrower than the thickness of the pipe and presents a convex outer surface, which by reason of its convex form has a rim bearing upon a corresponding shoulder in the coupling into which thelead-lined pipeis screwed, and therefore is less liable to be broken or cracked-by the torsional strain exerted on the lining by the contact of its projecting end with the shoulder in the coupling than would be the case if the projecting end of the lead lining were disposed in an outwardly-turned flange having a fiat outer surface.

It will be seen that the annular swaging-die and the annular knife extending continuously around the plug a enable the head to be formed and trimmed without rotation of 0 the tool, the latter acting as a hammer and .having only an endwise movement.

I claim The improved swage for forming lead beads on the ends of lead-lin ed hard-metal pipes,the 5 samecomprising a plug adapted to closely fitthe interior of the lead lining and an annular recess surrounding the plug to form a die for converting the projecting end of the lead lining into an annular bead on the end of the hard-metal pipe, the stock of the tool outside In testimony whereof I have signed my said recess being beveled to form an annular name to this specification, in the presence of 10 cutting edge or knife surrounding the said two subscribing witnesses, this 16th day of recess or die, whereby said cutting-edge is November, A. D. 1891.

5 adapted to trim off the surplus lead at the GEORGE W. HARRINGTON.

outer edge of the head by cutting against the Vitnesses: end of the hard-metal pipe, substantially as C. F. BROWN,

described. A. D. HARRISON. 

